Hayden Lake

• Survey and Notification

• Herbicide Application and Water Sampling

• Barriers

• Diver Dredge

Click on pictures to enlarge

SURVEY AND NOTIFICATION

	Example of the restriction notice required by the Idaho Dept. of Environmental Quality 48-hours before the herbicide application on Hayden Lake.
	48-hour posting all docks within 1/4 mile of an herbicide application.
	48-hour posting along the shore within a 1/4 mile of an herbicide application.
	An aerial survey of Sportsman's Bay on Hayden Lake before herbicide treatment to EWM.
	An aerial survey of Sportsman's Bay on Hayden Lake 4 weeks after 2,4-D herbicide treatment.
	An aerial survey of Sportsman's Bay on Hayden Lake 6 weeks after 2,4-D herbicide treatment.
	Using a data processing GPS receiver, a surface survey of EWM infestations were collected for treatment information.
	During a surface survey, rake sampling was conducted to determine the density of EWM in infested areas.

HERBICIDE APPLICATION AND WATER SAMPLING

	Granular herbicide spreader mounted on the front of an airboat in Cave Lake, ID.
	Granular herbicide application in action.
	Using a Kemmerer bottle to take a water sample after a 2,4-D herbicide treatment.
	Transferring the water sample to a lab sample bottle.
	Transferring the water sample to a lab sample bottle.
	Transferring the water sample to a lab sample bottle.
	The water sample from Hayden Lake to be tested for 2,4-D levels.
	Filling an applicator's tank with 2,4-D herbicide from a nurse boat.

BARRIERS

	Benthic barriers rolled up, ready to assemble on Lake Coeur d'Alene (August 2005)
	Assembling a benthic barrier on Lake Coeur d'Alene in August 2005.
	Floating barrier to target area for placement (August 2005).
	Returning rolled-up barrier to boat after removal (July 2006).

DIVER DREDGE

	Collected plants from diver hand pull with suction assist in tote.
	Top-side diver cleaning out plants collected with the diver dredging equipment.
	View of diver pulling EWM from the bottom and sucking the plant into the vacuum system.
	View of diver pulling EWM from the bottom and sucking the plant into the vacuum system.
	View of diver pulling EWM from the bottom and sucking the plant into the vacuum system.
	Pontoon barge used for diver dredging on the Hayden Lake project.